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Ch.7 - Quantum MechanicsWorksheetSee all chapters

# Photoelectric Effect

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Sections
Wavelength and Frequency
Speed of Light
The Energy of Light
Electromagnetic Spectrum
Photoelectric Effect
De Broglie Wavelength
Heisenberg Uncertainty Principle
Bohr Model
Emission Spectrum
Bohr Equation
Introduction to Quantum Mechanics
Quantum Numbers: Principal Quantum Number
Quantum Numbers: Angular Momentum Quantum Number
Quantum Numbers: Magnetic Quantum Number
Quantum Numbers: Spin Quantum Number
Quantum Numbers: Number of Electrons
Quantum Numbers: Nodes

What happens when light strikes the surface of a metal? The Photoelectric Effect can help to explain that.

###### Examining the Photoelectric Effect

Concept #1: Photoelectric Effect

Concept #2: Photoelectric Effect Formula

Example #1: The binding energy of electrons on a metal surface are 7.15 x 10-19 J. If an outside energy source with 4.33 x 10-17 J strikes the metal surface, what would be the kinetic energy of an ejected electron?

Concept #3: Photoelectric Effect Formula Expanded

Example #2: When the surface of metal is exposed to photons at a frequency of 7.13 x 1016 s-1, electrons are emitted with a maximum kinetic energy of 6.30 x 10-19 J. Calculate the work function of the metal.

Practice: A metal with a threshold frequency of 2.15 x 1015 s-1 emits an electron with a velocity of 7.03 x 106 m/s when radiation of 1.88 x 1015 s-1 strikes the metal’s surface. Calculate the mass of the electron.

Practice: An ultraviolet photon with a wavelength of 320 nm strikes a metal surface. The emitted electron has a kinetic energy of 1030 eV. What is the binding energy of the electron in kJ/mol? 1 electron volt (eV) = 1.602 x 10-19 J.